Officials are probing how a 51-year-old highway bridge came to collapse in the Italian port city of Genoa yesterday, killing at least 26 people and injuring 16 others as it sent dozens of vehicles tumbling into a heap of concrete and twisted steel.

"There are people in every party who oppose these developments," Ms Moore said.

She said the premier had promised any petition with over 10,000 signatures would prompt a debate in parliament.

Mr Buckingham told AAP that protecting the state's drinking supplies from toxic run-off from CSG developments was "just common sense".

"We welcome the commitment of the member for Wollondilly, Jai Rowell, to attempt to change government policy in this area and recommend he raise this issue with Barry O'Farrell as a matter of priority."

Meanwhile, environmental coalition Lock the Gate says the federal government is running out of time to ensure 39 coal and gas projects are covered under new laws designed to ensure mining projects don't put water reservoirs at risk.

Coal and CSG projects that had already been referred for scrutiny under the Environment Protection Biodiversity Protection Act can have the new "water trigger" laws applied, subject to a time limit that will run out just after the election on September 7.

A Lock the Gate analysis found there were 39 projects - including the Mount Penny tenement in the NSW Hunter Valley that was at the centre of a major corruption investigation - waiting on such a decision.